Under maintenance.

Most probably CPANTS databases are being regenerated from scratch due to major changes in Kwalitee metrics or updates of relevant modules/perl. Usually this maintenance takes about a day or two, and some of the information may be old or missing tentatively. Sorry for the inconvenience.

Kwalitee Indicator: has_changelog core

The distribution hasn't got a Changelog (named something like m/^chang(es?|log)|history$/i). A Changelog helps people decide if they want to upgrade to a new version.

How to fix

Add a Changelog (best named 'Changes') to the distribution. It should list at least major changes implemented in newer versions.